settings/extensions/git/#establish_extension.sh
#!/usr/bin/env bash

# this is a helper
relatively_link="$FORNIX_FOLDER/settings/extensions/#standard/commands/tools/file_system/relative_link"

# 
# connect during_clean
# 
"$relatively_link" "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/during_clean.sh" "$FORNIX_FOLDER/settings/during_clean/500_git.sh"

# 
# connect during_start_prep
# 
"$relatively_link" "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/during_start_prep.sh" "$FORNIX_FOLDER/settings/during_start_prep/051_000_copy_git_config.sh"

# 
# connect commands
# 
"$relatively_link" "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/commands" "$FORNIX_COMMANDS_FOLDER/tools/git"

# 
# config
# 
# if the project config exists
rm -f "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/config"
if [[ -f "$FORNIX_FOLDER/.git/config" ]]
then
    mkdir -p "$__THIS_FORNIX_EXTENSION_FOLDERPATH__"
    ln -s "../../../.git/config" "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/config"
fi

# always pay attention to case
git config core.ignorecase false

# if there's no pull setting, then add it to the project
git config pull.rebase &>/dev/null || git config pull.ff &>/dev/null || git config --add pull.rebase false &>/dev/null

# 
# ignore
# 
mkdir -p "$FORNIX_FOLDER/.git/info/"
# check if file exists
if [[ -f "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/exclude.ignore" ]]
then
    rm -f "$FORNIX_FOLDER/.git/info/exclude"
    ln "$__THIS_FORNIX_EXTENSION_FOLDERPATH__/exclude.ignore" "$FORNIX_FOLDER/.git/info/exclude"
fi

# 
# hooks
#
__temp_var_githooks_folder="$__THIS_FORNIX_EXTENSION_FOLDERPATH__/hooks"
# if the folder exists
if [[ -d "$__temp_var_githooks_folder" ]]
then
    # iterate over the files
    for dir in $(find "$__temp_var_githooks_folder" -maxdepth 1)
    do
        git_file="$FORNIX_FOLDER/.git/hooks/$(basename "$dir")"
        # ensure all the git hook files exist
        mkdir -p "$(dirname "$git_file")"
        touch "$git_file"
        # make sure each calls the hooks # FIXME: some single quotes in $dir probably need to be escaped here
        cat "$git_file" | grep "#START: fornix hooks" &>/dev/null || echo "
        #START: fornix hooks (don't delete unless you understand)
        if [ -n "'"$FORNIX_FOLDER"'" ]
        then
            absolute_path () {
                "'
                echo "$(builtin cd "$(dirname "$1")"; pwd)/$(basename "$1")"
                '"
            }
            for hook in "'$'"(find "'"$FORNIX_FOLDER"'"'/settings/extensions/git/hooks/$(basename "$dir")/' -maxdepth 1)
            do
                # check if file exists
                if [ -f "'"$hook"'" ]
                then
                    hook="'"$(absolute_path "$hook")"'"
                    chmod ugo+x "'"'"\$hook"'"'" &>/dev/null || sudo chmod ugo+x "'"'"\$hook"'"'"
                    "'"'"\$hook"'"'" || echo "'"'"problem running: \$hook"'"'"
                fi
            done
        fi
        #END: fornix hooks (don't delete unless you understand)
        " >> "$git_file"
        # ensure its executable
        chmod ugo+x "$git_file" &>/dev/null || sudo chmod ugo+x "$git_file"
    done
fi

# # 
# # setup object sharing across repos
# # 
# if [ -d "$FORNIX_FOLDER/.git/objects" ]
# then
#     # 
#     # add self to git_alternate_object_directories
#     # 
#     if [ "$HOME" != "$FORNIX_HOME" ]
#     then
#         # ensure the location exists
#         mkdir -p "$HOME/.cache/git_alternate_object_directories"
#         file_name="$(md5sum <<< "$FORNIX_FOLDER/.git/objects" | sed 's/ //g' | sed 's/-//g' )"
#         # create or overwrite the objects
#         printf '%s' "$FORNIX_FOLDER/.git/objects" > "$HOME/.cache/git_alternate_object_directories/$file_name"
#         rm -f "$FORNIX_HOME/.cache/git_alternate_object_directories" 2>/dev/null
#         rm -rf "$FORNIX_HOME/.cache/git_alternate_object_directories" 2>/dev/null
#         mkdir -p "$FORNIX_HOME/.cache/"
#         ln -s "$HOME/.cache/git_alternate_object_directories/" "$FORNIX_HOME/.cache/git_alternate_object_directories"
#     fi
    
#     # 
#     # create the GIT_ALTERNATE_OBJECT_DIRECTORIES var if needed
#     # 
#     if [ -z "$GIT_ALTERNATE_OBJECT_DIRECTORIES" ]
#     then
#         if [ -d "$FORNIX_HOME/.cache/git_alternate_object_directories" ]
#         then
#             # this loop is so stupidly complicated because of many inherent-to-shell reasons, for example: https://stackoverflow.com/questions/13726764/while-loop-subshell-dilemma-in-bash
#             for_each_item_in="$FORNIX_HOME/.cache/git_alternate_object_directories"; [ -z "$__NESTED_WHILE_COUNTER" ] && __NESTED_WHILE_COUNTER=0;__NESTED_WHILE_COUNTER="$((__NESTED_WHILE_COUNTER + 1))"; trap 'rm -rf "$__temp_var__temp_folder"' EXIT; __temp_var__temp_folder="$(mktemp -d)"; mkfifo "$__temp_var__temp_folder/pipe_for_while_$__NESTED_WHILE_COUNTER"; (cd "$for_each_item_in" && find "." -maxdepth 1 ! -path "." -print0 2>/dev/null | sort -z > "$__temp_var__temp_folder/pipe_for_while_$__NESTED_WHILE_COUNTER" &); while read -d $'\0' each
#             do
#                 each="$for_each_item_in/$each"
#                 each_dir="$(cat "$each")"
#                 # delete any invalid entries (happens when repos get moved or deleted)
#                 if ! [ -d "$each_dir" ]
#                 then
#                     rm -f "$each" 2>/dev/null
#                 else
#                     if [ -z "$GIT_ALTERNATE_OBJECT_DIRECTORIES" ]
#                     then
#                         GIT_ALTERNATE_OBJECT_DIRECTORIES="$each_dir"
#                     else
#                         GIT_ALTERNATE_OBJECT_DIRECTORIES="$GIT_ALTERNATE_OBJECT_DIRECTORIES:$each_dir"
#                     fi
#                 fi
#             done < "$__temp_var__temp_folder/pipe_for_while_$__NESTED_WHILE_COUNTER";__NESTED_WHILE_COUNTER="$((__NESTED_WHILE_COUNTER - 1))"
#         fi
#     fi
#     # export it
#     export GIT_ALTERNATE_OBJECT_DIRECTORIES="$GIT_ALTERNATE_OBJECT_DIRECTORIES"
# fi

unset relatively_link